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(No Model.)

7 V 2 Sheets--Sheet 1. H. F. WYATT.

- MORTISING MACHINE. No. 447,269.

Patented Feb. 24, 1891 wilbvmowo amem boz @513 hi y 6mm? 7 UNITED STATES- PATENT OFFICE.

HARRY'F. IVYATT, OF NENV YORK, N. Y. I

MORTISING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 447,269, dated February 24, 1891.

Application filed June 26, 1890.

To all whom it may concern.-

Be it known that I, HARRY F. \VYATT, a subject of the Queen of Great Britain and Ireland, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Mort-ising-lvlachines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to make and use the same,

reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The object of my invention is to provide means by which an opening can be readily cut in a flat, circular, or irregular surface of any size or shape desired, and by which the sides of theopenings can be cut at any angle desired or truly parallel to each other. I attain this object by the mechanism illustrated by the accompanying drawings.

Figure 1 represents a side view partly in section. Fig. 2 is a top View of same, showing opening cut in a semicircular stereotypeplate.

Similarletters represent similar parts in the two figures.

A represents a support of such shape as most suitable, according to whether the object to be out be round, square, octagonal, &c., provided witli suitable clamps. It is attached to a movable carriage B, which rests and slides upon asecond movable carriage C, which rests and slides on a fixed bed D. Bis moved forward or backward upon the carriage O by the screws E E operated bya suitable system of gearing G, and the carriage O is moved forward -or backward in a different direction from thatin which E moves by the screw at H, carrying with it the carriage B, on which is the support A. Only one screw is shown; but two or more maybe used connected with a gearing similar to that shown, as G.

The carriages may be guided by elevations fitting into corresponding grooves or other suitable means.

Attached to the bed D is the bracket X, which supports the cutting-tool K, which is The carriage Serial no. 856,889. (No model.)

worked up and down with considerable rapidity by any suitable mechanism, and is adjustable in a box N, so as to allow its cuttingedge to be adjusted to the line of the intended cutting, being firmly held while operating by the spring S, fastened to the box N, catching in a grooved part of K, as shown at O.

The fixed support A is represented in the drawings as furnished with the movable and adjustable wheel-shaped portions M M M M which together form the support. This makes it adapted for holding a curved object like a stereotype-plate, as M M M M can be revolved or shifted so as to allow the cutting tool K to cut in at any angle required. These movable and adjustable portions M 1V M M may be any numberor shape found most convenient for holding the object to be out.

In operating the machine, if it is intended to cut a rectangular opening, the carriage B is moved alone by E E, making a cut in the line of direction in which it moves, and then the carriages B and O are moved togetherby the screw H, making a cut at right angles to the first. If, however, at the same time the screw H is moving B and 0 together, screws E E move B the same distance, the second cut will be at an angle of forty-five degrees to.

the first, and the angle will vary according to the relative distances in which H and E E, respectively, move the carriages on which they act.

Having described my invention, what I claim as new is the following:

In a cutting or mortising machine, the combination of the movable carriages B and O with the bed D, the holder A, the adjustable supports M M M M", the bracket X, and the adjustable cutting-tool K, substantially as described.

In witness whereof I have subscribed my name, in the cityof New York, this 20th day of May, 1890.

HARRY F. WYATT.

In presence of PERCIVAL 0. SMITH, EDWARD P. LYON. 

